<template>
  <div class="list" ref="wrapper">
      <div>
        <div class="area">
            <div class="title border-topbottom">当前城市</div>
            <div class="button-list">
                <div class="button-wrapper">
                    <div class="button">{{this.currentCity}}</div>
                </div>
            </div>
        </div>
        <div class="area">
            <div class="title border-topbottom">热门城市</div>
            <div class="button-list">
                <div class="button-wrapper" 
                    v-for="item of hot" 
                    :key="item.id"
                    @click="handleCityClick(item.name)"
                >
                    <div class="button">{{item.name}}</div>
                </div>
            </div>
        </div>
        <div class="area" 
            v-for="(item,key) of cities" 
            :key="key" 
            :ref="key"
        >
            <div class="title border-topbottom">{{key}}</div>
            <div class="item-list">
                <div class="item border-bottom" 
                    v-for="innerItem of item" 
                    :key="innerItem.id"
                    @click="handleCityClick(innerItem.name)"
                >{{innerItem.name}}</div>
            </div>
        </div>
      </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import {mapState,mapMutations} from 'vuex'
export default {
  name: "CityList",
  props: {
      hot:Array,
      cities:Object,
      letter:String
  },
  methods: {
      handleCityClick (city) {
          this.changeCity(city)
          this.$router.push('/')
      },
      ...mapMutations(['changeCity'])
  },
  watch:{
      letter () {
          if(this.letter){
              const element = this.$refs[this.letter][0]
              this.scroll.scrollToElement(element)
          }
      }
  },
  mounted () {
      this.scroll = new Bscroll(this.$refs.wrapper)
  },
  computed: {
      ...mapState({
          currentCity: 'city'
      })
  }
}
</script>
<style lang="stylus" scoped>
.border-topbottom
    &:before
        border-color #ccc
    &:after
        border-color #ccc
.border-bottom
    &:before
        border-color #ccc
.list
    position absolute
    top 1.58rem
    left 0
    right 0
    bottom 0
    overflow hidden
    .title
        line-height .54rem
        background #eee
        padding-left .2rem
        color #666
        font-size .26rem
    .button-list
        padding .1rem .6rem .1rem .1rem
        overflow hidden
        .button-wrapper
            width 33.33%
            float left
            .button
                padding .1rem 0
                text-align center
                margin .1rem
                border .02rem solid #ccc
                border-radius .06rem
    .item-list
        .item
            line-height .76rem
            padding-left .2rem
</style>

